A timeline of intervention

13 April 1975

June 1976

Massive incursion by the Syrian army into Lebanon against the Palestine Liberation Organisation (PLO) and the Lebanese National Movement.

14 March 1978

Israel launches Operation Litani in southern Lebanon. Israeli troops withdraw in June after the United Nations Interim Force in Lebanon (Unifil) is set up.

6 June 1982

Start of Israel’s invasion of Lebanon (Operation Peace in Galilee). The siege of Beirut begins a few days later. At the end of August the PLO evacuates Beirut under the protection of a multinational force.

14-18 September 1982

Assassination of the new Lebanese president, Bashir Gemayel. Entry of Israelis into West Beirut. Massacres (...)